Tectonostratigraphic complexes of the southern Kronotskii paleoarc (Eastern Kamchatka): Structure, age, and composition

Tsukanov, N. V.; Palechek, T. N.; Soloviev, A. V.; Savelyev, D. P.

doi:10.1134/s1819714014040083

Cited by 12 publications

(6 citation statements)

References 6 publications

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“…Remnants of the arc are exposed on the Shipunsky, Kronotsky, and Kamchatka Mys peninsulas in eastern Kamchatka (e.g., Alexeiev et al, ; Bazhenov et al, ; Nokleberg et al, ; Zinkevich & Tsukanov, ; Figures and ). The intraoceanic volcanic arc was active from the Late Cretaceous (~85 Ma) to the Middle Eocene (e.g., Bazhenov et al, ; Levashova et al, ; Nokleberg et al, ; Shapiro & Solov’ev, ; Tsukanov et al, ). The youngest island‐arc basalts are ~40 Ma (Beniamovsky et al, ; Gladenkov, ; Levashova et al, ).…”

Section: Reviewmentioning

confidence: 99%

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

2019

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The Eocene (~50–45 Ma) major absolute plate motion change of the Pacific plate forming the Hawaii‐Emperor bend is thought to result from inception of Pacific plate subduction along one of its modern western trenches. Subduction is suggested to have started either spontaneously, or result from subduction of the Izanagi‐Pacific mid‐ocean ridge, or from subduction polarity reversal after collision of the Olyutorsky arc that was built on the Pacific plate with NE Asia. Here we provide a detailed plate‐kinematic reconstruction of back‐arc basins and accreted terranes in the northwest Pacific region, from Japan to the Bering Sea, since the Late Cretaceous. We present a new tectonic reconstruction of the intraoceanic Olyutorsky and Kronotsky arcs, which formed above two adjacent, oppositely dipping subduction zones at ~85 Ma within the north Pacific region, during another Pacific‐wide plate reorganization. We use our reconstruction to explain the formation of the submarine Shirshov and Bowers Ridges and show that if marine magnetic anomalies reported from the Aleutian Basin represent magnetic polarity reversals, its crust most likely formed in an ~85‐ to 60‐Ma back‐arc basin behind the Olyutorsky arc. The Olyutorsky arc was then separated from the Pacific plate by a spreading ridge, so that the ~55‐ to 50‐Ma subduction polarity reversal that followed upon Olyutorsky‐NE Asia collision initiated subduction of a plate that was not the Pacific. Hence, this polarity reversal may not be a straightforward driver of the Eocene Pacific plate motion change, whose causes remain enigmatic.

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Section: Reviewmentioning

confidence: 99%

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

2019

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“…The PAN2 plate is later consumed by the growth of SE Asian marginal basins during the late Cretaceous and Cenozoic (e.g., Philippine Sea, proto-South China Sea) (Figures 2s and 2t). During the late Cretaceous ∼85 Ma to early Cenozoic, we reconstruct a series of backarc basins along the NE Eurasian margin (Figure 2s) (Bazhenov et al, 1992;Levashova et al, 2000;Shapiro & Solov'ev, 2009;Tsukanov et al, 2014;Vaes et al, 2019). We reconstruct the Olyutorsky intra-oceanic arc by invoking a limited EUR-PAC spreading ridge inversion at 85 Ma (Figure 2s) that is relatively far south (25°N) and bounded by transform faults following Vaes et al (2019).…”

Section: Intra-oceanic Subduction Plate Reconstructionmentioning

confidence: 99%

NW Pacific‐Panthalassa Intra‐Oceanic Subduction During Mesozoic Times From Mantle Convection and Geoid Models

Lin

Colli

2022

Geochem Geophys Geosyst

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The plate tectonic history of the Pacific Ocean and its predecessor ocean, Panthalassa, are the most challenging regions on Earth to reconstruct within the Mesozoic and Cenozoic eras (Müller et al., 2016). The Pacific Ocean currently covers >25% of the present Earth surface and is the largest ocean basin on Earth; however, the Pacific-Panthalassa oceanic realm was even larger during the late Mesozoic, when it covered ∼45% of Earth and 65% of oceanic areas (Torsvik et al., 2019). Much of the Pacific-Panthalassan realm has been recycled due to subduction, and the lost Pacific-Panthalassa oceanic lithosphere is one of the most significant contributors to uncertainties in global plate tectonics (Torsvik et al., 2019) and atmospheric CO 2 estimates (Müller et al., 2022;Van Der Meer et al., 2014) since the Triassic. This paper discusses the plate tectonic history of NW Pacific-Panthalassa and its implications for subduction histories and accreted oceanic terranes along East Asia (Figure 1a). We consider explicitly the remnants of Pacific-Panthalassa that were subducted and are now within Earth's mantle by presenting forward geodynamic models that assimilate contrasted NW Pacific-Panthalassa plate reconstructions and testing them against mantle structure, the geoid and dynamic topography. We discuss our model implications for NW Pacific-Panthalassan subduction histories and slab sinking histories under the central Pacific.

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“…The geodynamic setting of Kamchatka in the Northernwest Pacific Ring of Fire transpacific subduction belt on the north of Kamchatka formed by the accretions of Late Cretaceous Achaivayam-Valagin arc terraine to the Eurasion margin at Early Eocene, ~50 Ma (Chekhovich andSukhov, 2006, Hourigan et al 2009;Bindeman et al 2002) and then Campan-Eocene Kronotsky arc terraine (Tsukanov et al, 2014) accreated to Kamchatka 10-6 Ma (Levashova et al, 2000), 7-10 Ma (Lander, Shapiro, 2007). The volcanism of Southern Kamchatka and the Kuriles has occurred under steady-state subduction conditions since the Miocene (Avdeiko et al, 2006).…”

Section: Geodynamic and Geological Settingsmentioning

confidence: 99%

Pleistocene-Holocene Monogenetic Volcanism at Malko-Petropavlovsk Zone of Transverse Dislocations on Kamchatka: Geological Setting, Spatial, Geochemical Paticular Features and Potential Volcanic Hazards

Bergal‐Kuvikas

Bindeman²,

Чугаев

et al. 2021

Preprint

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Based on government statistical data ~80% of the local Kamchatkan population (~250 ka people) live in the major cities on the coastal line of Avacha Gulf . It is the main transport seaway to Kamchatka , and and important Asia - North America air transport corridor. The Avacha Gulf is located in the Malko-Petropavlovsk zone of transverse dislocations (MPZ) on the extension of deep transform fault on the boundary between various ly aged slabs. Most of monogenetic cinder cones chaotic distributed in relation to the trench and belong to the long-living rupture zones of MPZ. Some of the monogenetic volcanoes are parasitic cones on the slopes of Koryaksky and Avachinsky stratovolcanoes and related with their magma plumbing systems. We here present new results of the geochemical and isotopic stud ies of monogenetic volcanism in MPZ. Based on whole rock and trace element geochemistry, Sr-Nd-Pb isotopic ratios of monogenetic volcanism, magmas were shown to sample the enriched mantle source with dominance decompression melting without significant inputs of the slab`s components. Calculations of the P, T conditions suggest magma residence of monogenetic cinder cones on the Moho boundary. That correlates with the geophysical observation of crustal discontinuity under the MPZ. Monogenetic cinder cones have an active magma plumbing system because during the Holocene time were several periods of activations. Presented results show necessary install continuous monitoring of environment changing around the Avacha Gulf and more serious attention from government and science. A more detailed investigation of MPZ will help degrease potential risks of eruptions from monogenetic volcanoes for human and infrastructures.

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Tectonostratigraphic complexes of the southern Kronotskii paleoarc (Eastern Kamchatka): Structure, age, and composition

Cited by 12 publications

References 6 publications

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

NW Pacific‐Panthalassa Intra‐Oceanic Subduction During Mesozoic Times From Mantle Convection and Geoid Models

Pleistocene-Holocene Monogenetic Volcanism at Malko-Petropavlovsk Zone of Transverse Dislocations on Kamchatka: Geological Setting, Spatial, Geochemical Paticular Features and Potential Volcanic Hazards

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